When simpleviews 2 is installed, it still says:
"Missing simpleviewer/viewer.swf"
This is because SV2 uses viewer.air instead, I think.

Until the .air method of integration is included into the code, user interface and documentation, it's best to download the old version of Simpleviews 1.9:
http://simpleviewer.net/simpleviewer/support/v1_9/index.html